Split communication/vst2.h into common and VST2

So we can reuse the generic bits for our VST3 implementation.

src/common/communication/vst2.cpp

@@ -16,18 +16,6 @@
 
 #include "vst2.h"
 
-#include <random>
-
-#include "../utils.h"
-
-namespace fs = boost::filesystem;
-
-/**
- * Used for generating random identifiers.
- */
-constexpr char alphanumeric_characters[] =
-    "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
-
 EventPayload DefaultDataConverter::read(const int /*opcode*/,
                                         const int /*index*/,
                                         const intptr_t /*value*/,
@@ -80,28 +68,3 @@ intptr_t DefaultDataConverter::return_value(const int /*opcode*/,
                                             const intptr_t original) const {
     return original;
 }
-
-boost::filesystem::path generate_endpoint_base(const std::string& plugin_name) {
-    fs::path temp_directory = get_temporary_directory();
-
-    std::random_device random_device;
-    std::mt19937 rng(random_device());
-    fs::path candidate_endpoint;
-    do {
-        std::string random_id;
-        std::sample(
-            alphanumeric_characters,
-            alphanumeric_characters + strlen(alphanumeric_characters) - 1,
-            std::back_inserter(random_id), 8, rng);
-
-        // We'll get rid of the file descriptors immediately after accepting the
-        // sockets, so putting them inside of a subdirectory would only leave
-        // behind an empty directory
-        std::ostringstream socket_name;
-        socket_name << "yabridge-" << plugin_name << "-" << random_id;
-
-        candidate_endpoint = temp_directory / socket_name.str();
-    } while (fs::exists(candidate_endpoint));
-
-    return candidate_endpoint;
-}